Interval Struct

struct QMediaTimeRange ::Interval

The QMediaTimeRange::Interval 类表示采用整数精度的时间间隔。 更多...

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公共函数

	Interval (qint64 start , qint64 end )
bool	contains (qint64 time ) const
qint64	end () const
bool	isNormal () const
Interval	normalized () const
qint64	start () const
Interval	translated (qint64 offset ) const

相关非成员

bool	operator!= (Interval lhs , Interval rhs )
bool	operator== (Interval lhs , Interval rhs )

详细描述

An interval is specified by an inclusive start () 和 end () time. These must be set in the constructor, as this is an immutable class. The specific units of time represented by the class have not been defined - it is suitable for any times which can be represented by a signed 64 bit integer.

The isNormal () method determines if a time interval is normal (a normal time interval has start () <= end ()). A normal interval can be received from an abnormal interval by calling the normalized () 方法。

The contains () method determines if a specified time lies within the time interval.

The translated () method returns a time interval which has been translated forwards or backwards through time by a specified offset.

另请参阅 QMediaTimeRange .

成员函数文档编制

[explicit constexpr noexcept] Interval:: Interval ( qint64 start , qint64 end )

Constructs an interval with the specified start and end times.

[constexpr noexcept] bool Interval:: contains ( qint64 time ) const

Returns true if the time interval contains the specified time . That is, start () <= time <= end ().

[constexpr noexcept] qint64 Interval:: end () const

Returns the end time of the interval.

另请参阅 start ().

[constexpr noexcept] bool Interval:: isNormal () const

Returns true if this time interval is normal. A normal time interval has start () <= end ().

另请参阅 normalized ().

[constexpr] Interval Interval:: normalized () const

Returns a normalized version of this interval.

若 start () time of the interval is greater than the end () time, then the returned interval has the start and end times swapped.

[constexpr noexcept] qint64 Interval:: start () const

Returns the start time of the interval.

另请参阅 end ().

[constexpr] Interval Interval:: translated ( qint64 offset ) const

Returns a copy of this time interval, translated by a value of offset . An interval can be moved forward through time with a positive offset, or backward through time with a negative offset.

相关非成员

[constexpr noexcept] bool operator!= ( Interval lhs , Interval rhs )

返回 true 若 lhs is not exactly equal to rhs .

[constexpr noexcept] bool operator== ( Interval lhs , Interval rhs )

返回 true 若 lhs is exactly equal to rhs .

内容

• 公共函数

• 相关非成员

• 详细描述